Python - Dict

** Dict


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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(student)
print(student['name'])
print(student['courses'])

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{'name': 'John', 'age': 25, 'courses': ['Math', 'CompSci']}
John
['Math', 'CompSci']

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(student['phone'])

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KeyError: 'phone'

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(student.get('phone'))

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None

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(student.get('phone', 'Not Found'))


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Not Found

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

student['phone'] = '555-5555'
student['name'] = 'Jane'

print(student)

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{'name': 'Jane', 'age': 25, 'courses': ['Math', 'CompSci'], 'phone': '555-5555'}

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

student.update({'name' : 'Jane', 'age' : 26, 'phone' : '555-5555'})


print(student)


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{'name': 'Jane', 'age': 26, 'courses': ['Math', 'CompSci'], 'phone': '555-5555'}

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

del student['age']

print(student)


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{'name': 'John', 'courses': ['Math', 'CompSci']}

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

age = student.pop('age')

print(student)
print(age)

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{'name': 'John', 'courses': ['Math', 'CompSci']}
25

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(len(student))

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3

---------------------------------

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(student.values())

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dict_values(['John', 25, ['Math', 'CompSci']])

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

print(student.items())

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dict_items([('name', 'John'), ('age', 25), ('courses', ['Math', 'CompSci'])])

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

for key in student:
print(key)

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name
age
courses

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student = {'name' : 'John', 'age' : 25, 'courses': ['Math', 'CompSci']}

for key, value in student.items():
print(key, value)

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name John
age 25
courses ['Math', 'CompSci']

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